package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Resource
    private DishMapper dishMapper;
    @Resource
    private DishFlavorMapper dishFlavorMapper;

    @Resource
    private SetmealMapper setmealMapper;
    @Resource
    private SetmealDishMapper setmealDishMapper;
    //新增菜品和相应口味
    @Override
    @Transactional
    public void insertDishWithFlavors(DishDTO dishDTO) {
        //向菜品表插入数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insertDish(dish);

        Long dishId=dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            //向口味表插入n条数据
            dishFlavorMapper.insertFlavorBatch(flavors);
        }
    }

    //分页查询
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> result = page.getResult();
        return new PageResult(total,result);
    }

    //批量删除
    @Override
    public void deleteBatch(List<Long> ids) {


        //判断当前菜品是否能够删除--是否存在起售中的商品
        for (Long id : ids) {
           Dish dish= dishMapper.getById(id);
           if(dish.getStatus() == StatusConstant.ENABLE){
               //起售中不能删除
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }


        //判断当前菜品是否能够删除--是否与套餐关联
        List<Long> setmealByDishIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if(setmealByDishIds != null && setmealByDishIds.size()>0){
            //套餐关联不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


        /*for (Long id : ids) {
            //删除菜品表数据
            dishMapper.deletById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/
        //批量删除数据
        dishMapper.deletByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);
    }

    //根据id查询菜品和口味
    @Override
    public DishVO selectById(Long id) {
        Dish dish=dishMapper.getById(id);
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    //根据id修改菜品基本信息和口味信息
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            //向口味表插入n条数据
            dishFlavorMapper.insertFlavorBatch(flavors);
        }

    }

    //根据分类id查询菜品
    @Override
    public  List<Dish> selectByCategoryId(Long categoryId) {
        Dish dish=Dish.builder()
                .categoryId(categoryId)
                .build();
        List<Dish> dishs=dishMapper.list(dish);
        return dishs;
    }

    //菜品起售、停售
    @Override
    public void status(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(dishIds);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }

        }
    }

    //根据分类id查询起售中菜品和口味
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {


        List<Dish> dishList=dishMapper.list(dish);
        List<DishVO> dishVOList=new ArrayList<>();
        for (Dish d : dishList) {
            DishVO dishVO=new DishVO();
            BeanUtils.copyProperties(d,dishVO);
            List<DishFlavor> flavors=dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }
}
